🔒 Local PDF toolbox · merge, edit, annotate — no upload

Everything PDFs need,
done in your browser.

PDFusion is the no-upload PDF toolbox — merge, convert, OCR, edit, compare, forms, signing and permanent redaction. All 22 tools run locally in your browser. Completely free, no install, no signup, and your files never leave this computer.

Start free → ⬇ Download desktop (Windows) Browse all features
22
Built-in tools
0
File uploads
7
Feature modules
100%
In your browser
🔒 No upload⚡ No install🆓 No signup🌙 Dark mode📦 Works offline🈶 Full Chinese support
Features

Seven modules covering every everyday PDF need

From reading to signing, from converting to redacting — one tool for the whole workflow.

📖

Read & Search

Page-by-page viewing, keyword search with jump-to highlight, zoom and print.

Read / Search
🔗

Merge & Create

Merge multiple files, images to PDF, and batch-convert Office / web / text to PDF.

MergeImages to PDFOffice to PDF
📝

Convert & Export

Rebuild PDFs into editable Word, Excel and PowerPoint.

To WordTo ExcelTo PPT
✏️

Edit

Edit text, add text / freehand / highlight annotations, bookmarks, organize and split pages.

Edit textAnnotateBookmarksOrganizeSplit
🔍

Recognize & Compare

OCR scanned files into searchable PDFs; line-by-line diff between two versions.

OCRVersion compare
🧾

Forms

Detect and fill interactive form fields, CSV import / export, flatten to lock.

Fill formsCSV
🛡️

Sign & Protect

E-signature, page numbers / headers & footers / watermark, compress, password encrypt & decrypt, permanent redaction.

E-signaturePasswordRedactionCompressWatermark
Browse all 22 tools
How it works

Four steps, done in seconds

Every tool works the same way: pick a tool → drop your file → adjust options → download the result.

①

Pick a tool

Choose a feature from the sidebar — sorted into seven clear modules.

②

Drop your file

Drag in or click to upload — everything stays in your browser, never uploaded.

③

Adjust options

Set range, format, language or style as needed, with live preview.

④

Download result

Export the processed file in one click; your original stays untouched.

🔒

Your files never leave this computer

PDFusion runs entirely in your browser — no files are uploaded to a server, and no login or account is required. The offline version even works fully disconnected: libraries, Chinese fonts and OCR language models are all bundled.

Pricing

Every feature, completely free

22 tools across 7 modules, all free forever — no Pro, no subscription, no hidden charges.

$0

No install, no signup, no usage limit. Everything runs locally in your browser and your files are never uploaded.

FAQ

Still have questions?

Here are the most common questions; the full list is on the FAQ page.

Are my files uploaded to the cloud?⌄
No. All processing happens locally in your browser; files are never sent to any server and are released from memory when you close the tab. That is also why very large files are limited by your computer’s memory.
Do I need to install or sign up?⌄
No. The online version runs right in your browser; the offline version works locally after you unzip and double-click “Start PDFusion.bat” — no install, no signup.
Is there any cost or usage limit?⌄
PDFusion is completely free. All 22 tools are open to use — no Pro, no subscription, no usage limit and no watermarks. Start with no install and no signup.
Will you start charging or switch to uploading files later?⌄
All PDF processing always happens locally in your browser. “Files are never uploaded” is a core promise that will not change, and the tools stay free.
Will Chinese text turn into garbled characters or boxes?⌄
No. Text, page numbers, watermarks, OCR and forms all support Chinese. The first time you output Chinese, a Chinese font (~5.7MB) loads once and is reused afterward.
See all FAQs

Ready to make PDFs simple?

No install, no signup — start now, and your files always stay in your hands.

🚀 Start free